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Day 2 Review

May 18-25
Across
Populations with low genetic ____ may have trouble in adapting to a changing environment.
Traits are based on improving ___ in organisms.
____ occurs when a new species is formed
Mechanism by which individuals with beneficial adaptations on average produce more offspring than other individuals
Scientists compare anatomy and DNA of organisms to show that species share common _____.
Genetic ___ and environmental factors affect natural selection.
Darwin saw the relatedness between species, but did not understand its ___. This would be presented by Gregor Mendel.
Down
Fitness is the ability to survive, reproduce, and have its ____ survive into adulthood.
Have a trait that helps a an organism survive in its environment
Increased competition, new predators, and loss of habitat lead to species ______ (or dying out)
Survival of the fittest is important to a population's success by removing ____ traits from the gene pool.
A whale's hindlimb which serves no real purpose is a good example of a ___ structure.
Selection ______ drive natural selection
____ habits are NOT used to determine common ancestry; DNA, traits, fossils are compared.
Ancient land mammals are thought to be the ancestors of what aquatic organisms?